Pls help me I’ll brainlest

What is the solution of the systems of equations? y=2/3x+3 x=-2

Recall that the owner of a local health food store recently started a new ad campaign to attract more business and wants to know if average daily sales have increased. historically average daily sales were approximately $2,700. the upper bound of the 95% range of likely sample means for this one-sided test is approximately $2,843.44. if the owner took a random sample of forty-five days and found that daily average sales were now $2,984, what can she conclude at the 95% confidence level?

The equation of a parabola is given. y=18x2+4x+20 what are the coordinates of the focus of the parabola?